Caliber C07 - small second - COSC
The barrel in the C07 automatic movement has been re-engineered so it is possible to store more energy in the barrel spring. With Swiss quality guaranteed, the C07 offers an extended power reserve of up to 80 hours, meaning you don’t need to reset your watch if you decide not to wear it for a few days. This version has a silicon hairspring and is so precise, it has been officially certified by COSC as a chronometer. This means that it is accurate to within +/- 6 seconds per day.